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  2. Converse relation - Wikipedia

    en.wikipedia.org/wiki/Converse_relation

    Although many functions do not have an inverse, every relation does have a unique converse. The unary operation that maps a relation to the converse relation is an involution , so it induces the structure of a semigroup with involution on the binary relations on a set, or, more generally, induces a dagger category on the category of relations ...

  3. Inverse (logic) - Wikipedia

    en.wikipedia.org/wiki/Inverse_(logic)

    The inverse and the converse of a conditional are logically equivalent to each other, just as the conditional and its contrapositive are logically equivalent to each other. [1] But the inverse of a conditional cannot be inferred from the conditional itself (e.g., the conditional might be true while its inverse might be false [2]). For example ...

  4. Contraposition - Wikipedia

    en.wikipedia.org/wiki/Contraposition

    The inverse is "If a polygon is not a quadrilateral, then it does not have four sides." In this case, unlike the last example, the inverse of the statement is true. The converse is "If a polygon has four sides, then it is a quadrilateral." Again, in this case, unlike the last example, the converse of the statement is true.

  5. Inverse relation - Wikipedia

    en.wikipedia.org/wiki/Inverse_relation

    In mathematics, inverse relation may refer to: Converse relation or "transpose", in set theory; Negative relationship, in statistics; Inverse proportionality; Relation between two sequences, expressing each of them in terms of the other

  6. Converse (logic) - Wikipedia

    en.wikipedia.org/wiki/Converse_(logic)

    In logic and mathematics, the converse of a categorical or implicational statement is the result of reversing its two constituent statements. For the implication P → Q, the converse is Q → P. For the categorical proposition All S are P, the converse is All P are S. Either way, the truth of the converse is generally independent from that of ...

  7. Converse (semantics) - Wikipedia

    en.wikipedia.org/wiki/Converse_(semantics)

    [1] [2] The relationship between such words is called a converse relation. [2] Converses can be understood as a pair of words where one word implies a relationship between two objects, while the other implies the existence of the same relationship when the objects are reversed.

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  9. Talk:Converse (logic) - Wikipedia

    en.wikipedia.org/wiki/Talk:Converse_(logic)

    Could you explain the difference (if there is one) between converse and inverse? 134.250.72.141 First, don't confuse the method (conversion or inversion) with the product of the method (converse or inverse).